Final Exam - BCH2333 2009 Final -Mezls questions Answers...

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8 BCH2333 2009 Final -Mezl’s questions I do not have the other parts. vm ADD 00ANSEALL Answers are on bottom. 29. Coulomb’s law gives : A) the repulsion between two molecules as a function of their charge and the dielectric constant B) the repulsion between two molecules as a function of their mass and their dipole moment C) the attraction between two molecules as a function of their charge and the dielectric constant D) the attraction between two molecules as a function of their mass and the dielectric constant E) the attraction between two molecules as a function of their mass and their dipole moment 30. Going from the highest to the lowest, the order of these dielectric constants is: A) water > ethanol >toluene B) water > toluene >ethanol C) toluene >water > ethanol D) toluene > ethanol > water E) ethanol > toluene > water 31. An alcohol group is hydrogen bonded to an aldehyde oxygen. The distance between the center of one oxygen and the center of the other oxygen is about: A) 0.16 nm B) 0.28 nm C) 0.35 nm D) 0.45 nm E) 2.2 nm 32. If you put 1 g of a sugar into your blood, which of the following would contribute the LEAST to the osmotic pressure? A) deoxyribose B) glucuronic acid C) glucose D) lactose E) mannitol 33. In pure water, about . ........ water molecules are ionized. A) 0.01% of the B) one in 10 C) D) E) one in 10 6 91 21 4 34. A 1 L solution contains a 40 mM pH 7 buffer. The pK of the weak acid is 7. You add 1 mL of 1 N base. The new pH is about : A) 6.8 B) 7.0 C) 7.3 D) 7.45 E) 7.6 35. Penicillin inactivates the enzymes that A) replicate DNA B) translate mRNAs C) cross link collagens D) cross link the peptidoglycans of bacterial cell walls E) cross link the lipid bilayer of the bacterial membrane
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9 36. Which of these is an L-amino acid? 22 H NH H R HN 3 R H 3 RR 3 COOH H N 3 COOH H 3 COOH 2 COOH COOH H R NH (A) (B) (C) (D (E) 37. L-idose is a 6 carbon sugar. You take carbon 6 and you replace the H on it with a OH and the OH with an H (you flip the two around). This will give: A) D-idose B) L-idose C) L-epimero-idose D) a L-sugar with a different name E) a D-sugar with a different name 38. The compound on the right is a : A) D-aldose B) L-aldose C) D-hexose D) L-hexose E) D-glucose 39. The molecule on the right is: A) Glucose B) Mannose C) Galactose D) A D-sugar but not one of the ones to know by heart E) An L-sugar but not one of the ones to know by heart 40. The amount of glucose in 5 ml of your blood is about : A) 5 ì g B) 100 ì g C) 500 ì g D) 1 mg E) 5 mg 41. In a normal person glucose is ..... % of blood.
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Final Exam - BCH2333 2009 Final -Mezls questions Answers...

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